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HENRY WUR-TZ, OF new YORK, N. Y.

Letters Patent No. 73,860, dated January 28, 1868 IMPROVEMENT IN THE PREPARATION OF GBAHAMITE.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, HENRY WURrz, of New York, in the county of New York, in the State of New York,- have invented a new and improved mode of operating upon a certain mineral, found forming a. vein in the rocks upon McFarland's Run, in Ritchie county,West Virginia, (and known as Ritchie coal,. Ritchie usphnltum," crystallized petroleum,&c., but) called by me Grahamite, so as to obtain-therefrom new and useful products and I do hereby declare that the following is a full and exact description thereof.

Description.

The nature of my invention consists in operating upon Grahamite with certain liquid media or menstrual, which I have found to exert thereupon c. more or less complete solvent'action, for the purpose of separating it from the impurities with which it is naturally commingled, and obtaining it, by subsequent evaporation of the solvent, in a. purified resinous form, susceptible of being converted to valuable uses. I

V In order to enable others to practise and use my invention, 1 shall proceed to describe myanethods of operation.

Theiproducts which I obtain in practice from Grahamite by my methods are four in species, according to the solvents I make use of, and the mode of operation.

1. Certain solvents, among which maybe mentioned chloroform, bisulpbide of carbon, coal-tar benzole, and Grahamite-benzole, dissolve (as I have discovered) substantially the whole mess of the mineral, leaving behind but a small percentage of impurities. With these, therefore, the operation of obtaining pure Gruhumite is very simple, and consists simply in digesting the powdered mineral in the solvent until the solution thereof is nearly or quite complete, straining or decanting the liquid, and evaporating or distilling it to dryness in any suitable apparatus. The residue obtained, which constitutes the first species of product, is called by me pure or purified Gialiamitc.

2. Certain other solvents, among which may be mentioned sulphuric ether and petroleum-naphtha. (or socallcd bcnzinef) of commerce, have found to dissolve Grahamite but partially, separuting it into two portions, the portion soluble in these menstrna (when recov ered from the solution by distillation or evaporation) being a peculiar resinous or resinoid substance, of a very highly ductile and adhesive consistence when warm, and usually of a peculiar aromatic odor, which constitutes mysecond species of product, called by me Alpha (or No. 1) Grahamite Rcsinoid, or Viscosine.

3. After extraction of the above material by the second class of solvents, the remaining pulvcrulent mass may be thoroughly rinsed with the solvent, and dried; and a third species'of product is thus obtained, possess ing properties which ndupt it for special uses, and which I call Washed Grahamite.

d. The fourth species is obtained simply by treating the washed Grahnrnite, No. 3,Wltl1 a solvent belonging to the class specified under 1, which dissolves substantially the whole of'theGrahsmite, except impurities. Filtering the solution and evaporating, the residuum constitutes my fourth species of product, called by m( Beta. (or No. 2) Grahamite Resincid.

:r This rcsinoid substance I generally designatenlso by the name Irisine, in consequence of .thc magnificent rainbow-colors produced on polished surfaces by the evaporation of its solutions thereon.

Claims.

What I claim as my invention, and desire to secure by Letters Patent, is

l. The separation, from'any impurities with which it may naturally occur commingled, of the mineral sub stance called by me Grahamite, by the use of a liquid medium or menstruum, substantially as above set forth 2; The separation of Grahamite into two distinct substances by the action of solvent media. or menstrue. substantially as above set forth. I

In testimony whereof, I have hereunto attached my signature, in the presence of two witnesses, in Wash ington, this thirty-first day of July, 1867. Q

HENRY WURTZ.

Witnessesi Joint Ft GLARK, O; A. SEARS. 

